Resonance and Doppler-shifted electromagnetic modes in organic conductorsD. I. Stepanenko
B.Verkin Institute for Low Temperature Physics and Engineering, Ukrainian Academy of Sciences 47 Lenin ave, Kharkov, 61103, Ukraine
received 18 September 2007; accepted in final form 27 March 2008; published May 2008
published online 13 May 2008
The electromagnetic modes in organic conductors with marked anisotropy Fermi surface in the form of the warping planes has been investigated theoretically in the presence of an external magnetic field H0. The specific feature of such electron energy spectrum is that the electron drift velocity is an oscillatory function of the angle of magnetic-field direction. For certain orientations of H0 there is no Landau absorption, and propagation of weakly damped collective modes is possible even under strong spatial dispersion. We have shown that the high-frequency collective modes which are analogues of cyclotron waves in metals with closed Fermi surface sections may occur in the considered conductors. The spectrum of these excitations in the neighborhood of the resonances has been obtained.
72.15.Nj - Collective modes (e.g., in one-dimensional conductors).
72.15.Gd - Galvanomagnetic and other magnetotransport effects.
© EPLA 2008